The House passed a version of the bill Monday night with a 70-64 vote. The Senate approved their own version last month, but approved the House version 38-28.

Some of the changes in the latest bill sent to Pawlenty: Patients can't grow their own plants and they must be terminally ill with a debilitating illness. Cancer patients who would use it to treat nausea from chemotherapy were also disqualified.

Like the original Senate legislation, the bill would create a system where doctors prescribe marijuana to a patient who would use a special photo ID to purchase the drug from state-licensed dispensaries.

Medical marijuana supporters say they will push for a constitutional amendment if Pawlenty holds the bill back. If it was proposed as a constitutional amendment, residents would get to vote on the issue. Nine of the 13 states with medical marijuana laws had it legalized by voters.